{
    "apps":[
        {
            "app_name":"test",
            "server_list":[
                {
                    "ip":"127.0.0.1",
                    "port":3450,
                    "site":"s1"
                },
                {
                    "ip":"127.0.0.1",
                    "port":3451,
                    "site":"s1"
                },
                {
                    "ip":"127.0.0.1",
                    "port":3452,
                    "site":"s2"
                },
                {
                    "ip":"127.0.0.1",
                    "port":3453,
                    "site":"s3"
                }
            ]
        }
    ]
}

